Ancient distance and apparent size of the moon

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The Moon currently moves away from us at a rate of 3.8cm/year (1.5"/yr). BUT this 'lunar retreat' rate has varied over the last 4.5 billion years. This is a rough idea of what it may have looked like. Causes of variation: (1) meteor impacts on Earth or Moon. (2) reconfiguration of landmasses with earthquakes that generate changes in the rotational axis of the Earth.

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Just imagine the daily tsunami tides that must have been in the early Earth's seas...

SomeoneCommenting
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0 million years ago (today) the rate of retreat is 3.8cm per year, not 1.46. Right?

williammiller
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And how the rotation speed of the moon was impacted ?

aftereffectstipstreats-byj
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What was the radius of moon 4.5 billion years ago?(or how much did you use when calculating
I couldn't get same value as video when I used 1737km

Сору-еч
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Is this 'lunar retreat' become zero per yr someday or...?

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